We have 2 cats and 1 dog. Of coarse the dog hates the cats but our long time cat hates the newest cat, this one was feral and skiddish and had been attacked by another dog. I took it to the vet to get patched up, vaccinated and bought it home to recover. It has recovered and has a great personality once it got used to being around people and that greatly clashes with the rules the roost cat.